docs: make build badge clickable

Author: darbyluv2code

README.md

@@ -1,6 +1,6 @@
 # Master Java Design Patterns
 
-![Build Status](https://github.com/darbyluv2code/master-java-design-patterns/actions/workflows/build.yml/badge.svg)
+[![Build Status](https://github.com/darbyluv2code/master-java-design-patterns/actions/workflows/build.yml/badge.svg)](https://github.com/darbyluv2code/master-java-design-patterns/actions/workflows/build.yml)
 
 Source code for the course: [Master Java Design Patterns](https://www.luv2code.com/master-java-design-patterns-github)